package com.zsh.wanandroid.common;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import com.zsh.wanandroid.R;
import com.zsh.wanandroid.utils.LogUtils;
import com.zsh.wanandroid.utils.UIUtils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author zsh
 * @date 2019/10/21.
 * 功能：程序中的未捕获的全局异常的捕获（单例）工具
 */

public class CrashHandler implements Thread.UncaughtExceptionHandler {

    private Context mContext;

    //系统默认的UncaughtException处理类
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    //CrashHandler实例
    private static CrashHandler INSTANCE = new CrashHandler();
    //用来存储设备信息和异常信息
    private Map<String, String> infos = new HashMap<String, String>();

    //用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss");

    private String path = APP.errorLogPath;

    private String result = "";
    private Integer userId = null;

    /**
     * 保证只有一个CrashHandler实例
     */
    private CrashHandler() {
    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化
     */
    public void init(Context context) {
        mContext = context;
        //获取系统默认的UncaughtException处理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        //设置该CrashHandler为程序的默认处理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {

            //发送日志到服务器
//            ErrorBug errorBug = new ErrorBug();
//            errorBug.setMessage(result);
//            String json = new Gson().toJson(errorBug);
//            //sendCrash(json);
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                LogUtils.e(e.getMessage());
            }
            //退出程序，停止所有activity
            AppManager.getAppManager().appExit(mContext);
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(0);
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        //使用Toast来显示异常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                UIUtils.showToast("很抱歉'" + mContext.getString(R.string.app_name) +
                        "'程序出现异常，正在上传日志，即将退出！");
                Looper.loop();
            }
        }.start();
        //收集设备参数信息
        collectDeviceInfo(APP.mContext);
        //保存日志文件
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (PackageManager.NameNotFoundException e) {
            LogUtils.e("an error occured when collect package info", e);
        }
        Field[] fields = Build.class.getDeclaredFields();
        String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(System.currentTimeMillis()));
        result += "时间：" + time + "\\n";
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                result += field.getName() + " : " + field.get(null) + "\\n";
                LogUtils.i(field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                LogUtils.e("an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */
    private String saveCrashInfo2File(Throwable ex) {

        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");
        }

        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        result += writer.toString();
        result = result.replace("\\n", "\n");
        LogUtils.e("程序报错信息：" + result);
        sb.append(result);
        try {
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "crash-" + time + ".txt";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                //String path = MyApplication.errorLogPath + "/";
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();//创建文件
                }
                FileOutputStream fos = new FileOutputStream(path + fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            UIUtils.showToast("报错："+e.getMessage());
            LogUtils.e("an error occured while writing file...", e);
        }
        return null;
    }

    /**
     * 上传错误日志到服务器
     *
     * @param json
     */
    private void sendCrash(String json) {
//        String url = HttpUrl.submitExceptionclient;
//        LogUtils.e(url);
//        //原生okhttp，请求网络不能再主线程
//        OkHttpClient okHttpClient = new OkHttpClient();
//        FormBody body = new FormBody.Builder()
//                .add("message", json)
//                .build();
//        final Request request = new Request.Builder().url(url).post(body).build();
//        Call call = okHttpClient.newBuilder()
//                .build().newCall(request);
//        call.enqueue(new Callback() {
//
//            @Override
//            public void onFailure(Call call, IOException e) {
//                Message message = Message.obtain();
//                message.what = 400;
//                message.obj = "网络异常，请检查网络";
//                mHandler.sendMessage(message);
//            }
//
//            @Override
//            public void onResponse(Call call, Response response) throws IOException {
//                LogUtils.e(response.body().string());
//                Message message = Message.obtain();
//                message.what = 100;
//                message.obj = "崩溃日志，上传成功";
//                mHandler.sendMessage(message);
//            }
//        });

    }

//    private void forceStopAPK(String pkgName){
//        Process sh = null;
//        DataOutputStream os = null;
//        try {
//            sh = Runtime.getRuntime().exec("su");
//            os = new DataOutputStream(sh.getOutputStream());
//            final String Command = "am force-stop "+pkgName+ "\n";
//            os.writeBytes(Command);
//            os.flush();
//
//        } catch (IOException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
//
//        try {
//            sh.waitFor();
//        } catch (InterruptedException e) {
//            // TODO Auto-generated catch block
//            e.printStackTrace();
//        }
//    }

    Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case 100: //
                    UIUtils.showToast(msg.obj.toString());
                    break;

                case 400:
                    UIUtils.showToast(msg.obj.toString());
                    break;
            }
        }
    };

}
